12146639 has 2 divisors, whose sum is σ = 12146640. Its totient is φ = 12146638.

The previous prime is 12146627. The next prime is 12146647. The reversal of 12146639 is 93664121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12146639 - 2⁴ = 12146623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12146669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6073319 + 6073320.

It is an arithmetic number, because the mean of its divisors is an integer number (6073320).

Almost surely, 2^12146639 is an apocalyptic number.

12146639 is a deficient number, since it is larger than the sum of its proper divisors (1).

12146639 is an equidigital number, since it uses as much as digits as its factorization.

12146639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 32.

The square root of 12146639 is about 3485.2028635361. The cubic root of 12146639 is about 229.8716296890.

The spelling of 12146639 in words is "twelve million, one hundred forty-six thousand, six hundred thirty-nine".